For several weeks now my iOS DIGITS app will randomly alert me with notification sounds or vibrations. These notifications are not related to any banner notification or call, sms, voicemail activities. I can't seem to figure out what his causing this or what is it is alerting me about. Super confusing.

Sometimes I receive multiple notifications within a 10 minute time period. Other times it can span multiple hours without any alert.

It happens on both strong WiFi and strong LTE connections, so it doesn't seem to be related to poor network connections.

It happens when I am traveling as well as stationary, so I don't think it has to do with moving between towers/sectors or VoWiFI-VoLTE handoffs.